问题 解答题
怎样简便就怎样算:
24×(
3
8
+
1
6
+
5
12
)
11
12
×7÷
7
12
2.8×(
1
7
+
3
28
23×
14
39
+14×
16
39
101×
99
102
3
10
-
3
10
÷6.
答案

(1)24×(

3
8
+
1
6
+
5
12
),

=24×

3
8
+24×
1
6
+24×
5
12

=9+4+10,

=23;

(2)

11
12
×7÷
7
12

=

11
12
×7×
12
7

=11;

(3)2.8×(

1
7
+
3
28
),

=2.8×

1
7
+2.8×
3
28

=0.4+0.3,

=0.7;

(4)23×

14
39
+14×
16
39

=23×

14
39
+16×
14
39

=(23+16)×

14
39

=39×

14
39

=14;

(5)101×

99
102

=(102-1)×

99
102

=102×

99
102
-
99
102

=99-

99
102

=98

1
34

(6)6÷

3
10
-
3
10
÷6,

=20-

1
20

=19

19
20

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